265 lines
7.9 KiB
Java
265 lines
7.9 KiB
Java
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.telephony;
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import android.annotation.IntRange;
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import android.compat.annotation.UnsupportedAppUsage;
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import android.os.Build;
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import android.os.Parcel;
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import android.os.Parcelable;
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import android.os.PersistableBundle;
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import com.android.telephony.Rlog;
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import java.util.Objects;
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/**
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* GSM signal strength related information.
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*/
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public final class CellSignalStrengthGsm extends CellSignalStrength implements Parcelable {
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private static final String LOG_TAG = "CellSignalStrengthGsm";
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private static final boolean DBG = false;
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private static final int GSM_RSSI_MAX = -51;
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private static final int GSM_RSSI_GREAT = -89;
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private static final int GSM_RSSI_GOOD = -97;
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private static final int GSM_RSSI_MODERATE = -103;
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private static final int GSM_RSSI_POOR = -107;
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private static final int GSM_RSSI_MIN = -113;
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private static final int[] sRssiThresholds = new int[] {
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GSM_RSSI_POOR, GSM_RSSI_MODERATE, GSM_RSSI_GOOD, GSM_RSSI_GREAT};
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private int mRssi; // in dBm [-113, -51] or UNAVAILABLE
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@UnsupportedAppUsage
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private int mBitErrorRate; // bit error rate (0-7, 99) TS 27.007 8.5 or UNAVAILABLE
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@UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P)
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private int mTimingAdvance; // range from 0-219 or CellInfo.UNAVAILABLE if unknown
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private int mLevel;
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/** @hide */
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@UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
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public CellSignalStrengthGsm() {
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setDefaultValues();
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}
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/** @hide */
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public CellSignalStrengthGsm(int rssi, int ber, int ta) {
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mRssi = inRangeOrUnavailable(rssi, GSM_RSSI_MIN, GSM_RSSI_MAX);
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mBitErrorRate = inRangeOrUnavailable(ber, 0, 7, 99);
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mTimingAdvance = inRangeOrUnavailable(ta, 0, 219);
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updateLevel(null, null);
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}
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/** @hide */
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public CellSignalStrengthGsm(CellSignalStrengthGsm s) {
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copyFrom(s);
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}
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/** @hide */
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protected void copyFrom(CellSignalStrengthGsm s) {
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mRssi = s.mRssi;
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mBitErrorRate = s.mBitErrorRate;
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mTimingAdvance = s.mTimingAdvance;
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mLevel = s.mLevel;
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}
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/** @hide */
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@Override
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public CellSignalStrengthGsm copy() {
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return new CellSignalStrengthGsm(this);
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}
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/** @hide */
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@Override
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public void setDefaultValues() {
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mRssi = CellInfo.UNAVAILABLE;
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mBitErrorRate = CellInfo.UNAVAILABLE;
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mTimingAdvance = CellInfo.UNAVAILABLE;
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mLevel = SIGNAL_STRENGTH_NONE_OR_UNKNOWN;
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}
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/** {@inheritDoc} */
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@Override
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@IntRange(from = SIGNAL_STRENGTH_NONE_OR_UNKNOWN, to = SIGNAL_STRENGTH_GREAT)
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public int getLevel() {
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return mLevel;
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}
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/** @hide */
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@Override
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public void updateLevel(PersistableBundle cc, ServiceState ss) {
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int[] rssiThresholds;
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if (cc == null) {
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rssiThresholds = sRssiThresholds;
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} else {
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rssiThresholds = cc.getIntArray(CarrierConfigManager.KEY_GSM_RSSI_THRESHOLDS_INT_ARRAY);
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if (rssiThresholds == null || rssiThresholds.length != NUM_SIGNAL_STRENGTH_THRESHOLDS) {
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rssiThresholds = sRssiThresholds;
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}
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}
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int level = NUM_SIGNAL_STRENGTH_THRESHOLDS;
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if (mRssi < GSM_RSSI_MIN || mRssi > GSM_RSSI_MAX) {
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mLevel = SIGNAL_STRENGTH_NONE_OR_UNKNOWN;
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return;
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}
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while (level > 0 && mRssi < rssiThresholds[level - 1]) level--;
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mLevel = level;
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}
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/**
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* Get the GSM timing advance between 0..219 symbols (normally 0..63).
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* <p>{@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE} is reported when there is no RR
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* connection. Refer to 3GPP 45.010 Sec 5.8.
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*
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* @return the current GSM timing advance, if available.
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*/
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public int getTimingAdvance() {
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return mTimingAdvance;
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}
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/**
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* Get the signal strength as dBm.
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*
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* @return the RSSI of the measured cell.
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*/
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@Override
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public int getDbm() {
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return mRssi;
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}
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/**
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* Get the RSSI in ASU.
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*
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* Asu is calculated based on 3GPP RSSI. Refer to 3GPP 27.007 (Ver 10.3.0) Sec 8.69
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*
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* @return RSSI in ASU 0..31, 99, or
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* {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE}.
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*/
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@Override
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public int getAsuLevel() {
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return getAsuFromRssiDbm(mRssi);
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}
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/**
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* Return the Received Signal Strength Indicator.
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*
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* @return the RSSI in dBm (-113, -51) or
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* {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE}.
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*/
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public int getRssi() {
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return mRssi;
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}
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/**
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* Return the Bit Error Rate.
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*
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* @return the bit error rate (0-7, 99) as defined in TS 27.007 8.5 or
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* {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE}.
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*/
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public int getBitErrorRate() {
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return mBitErrorRate;
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}
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@Override
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public int hashCode() {
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return Objects.hash(mRssi, mBitErrorRate, mTimingAdvance);
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}
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private static final CellSignalStrengthGsm sInvalid = new CellSignalStrengthGsm();
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/** @hide */
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@Override
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public boolean isValid() {
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return !this.equals(sInvalid);
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}
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@Override
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public boolean equals(Object o) {
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if (!(o instanceof CellSignalStrengthGsm)) return false;
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CellSignalStrengthGsm s = (CellSignalStrengthGsm) o;
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return mRssi == s.mRssi
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&& mBitErrorRate == s.mBitErrorRate
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&& mTimingAdvance == s.mTimingAdvance
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&& mLevel == s.mLevel;
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}
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/**
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* @return string representation.
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*/
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@Override
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public String toString() {
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return "CellSignalStrengthGsm:"
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+ " rssi=" + mRssi
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+ " ber=" + mBitErrorRate
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+ " mTa=" + mTimingAdvance
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+ " mLevel=" + mLevel;
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}
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/** Implement the Parcelable interface */
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@Override
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public void writeToParcel(Parcel dest, int flags) {
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if (DBG) log("writeToParcel(Parcel, int): " + toString());
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dest.writeInt(mRssi);
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dest.writeInt(mBitErrorRate);
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dest.writeInt(mTimingAdvance);
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dest.writeInt(mLevel);
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}
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/**
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* Construct a SignalStrength object from the given parcel
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* where the token is already been processed.
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*/
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private CellSignalStrengthGsm(Parcel in) {
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mRssi = in.readInt();
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mBitErrorRate = in.readInt();
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mTimingAdvance = in.readInt();
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mLevel = in.readInt();
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if (DBG) log("CellSignalStrengthGsm(Parcel): " + toString());
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}
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/** Implement the Parcelable interface */
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@Override
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public int describeContents() {
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return 0;
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}
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/** Implement the Parcelable interface */
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@SuppressWarnings("hiding")
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public static final @android.annotation.NonNull Parcelable.Creator<CellSignalStrengthGsm> CREATOR =
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new Parcelable.Creator<CellSignalStrengthGsm>() {
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@Override
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public CellSignalStrengthGsm createFromParcel(Parcel in) {
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return new CellSignalStrengthGsm(in);
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}
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@Override
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public CellSignalStrengthGsm[] newArray(int size) {
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return new CellSignalStrengthGsm[size];
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}
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};
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/**
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* log
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*/
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private static void log(String s) {
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Rlog.w(LOG_TAG, s);
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}
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}
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